Filer Command Types
There are three general types of Filer commands:
Global commands can be run from any Filer prompt. They display information (help,
Filer defaults, current date and time), determine how Filer runs (redirect output
and input, set numeric format for output and input, enable and disable Filer features,
set the priority of the Filer process), and exit the Filer program.
Upper-level commands can be run from any Filer prompt. They direct Filer to display
a specific object in the file system, for example a cylinder index. The Filer prompt
changes to reflect the object type, for example CI for cylinder index. While the prompt
shows a particular object type, Filer accepts commands specific to objects at that
Most upper-level commands require one or more parameters that specify the particular
object on which to act. For example, each cylinder index is specified by a unique
cylinder ID (cylid). Filer remembers the specifications and continues to act on the
same object until either new parameters are entered that identify a different object
at the same level, or a command is entered that switches Filer to a different level
in the file system hierarchy.
Lower-level commands manipulate the currently selected file system object. These commands
behave slightly differently, depending on the currently selected object type. While
some of these commands are harmless, such as DISPLAY, DROP, NEXT and PREVIOUS, others
manipulate file system data that is critical to the operation of the system.
You should be completely familiar with file system concepts and architecture before
using the lower-level commands. Improper use of these commands can seriously damage